Various Circuits
various electronic circuit diagrams and projects
Various circuits - related electronic projects and circuit diagrams (schematics), this helps you finding desired informations and facilitates your site navigation through all articles database.
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Cold Sensor
Mar 15th
This circuit monitors the temperature level in Air-conditioned rooms, Labs, Cold storage etc. and intimate you whether the low temperature is maintained in the room or not. It gives audio visual indications when the Air-conditioning system or freezing system fails and temperature rises. This prevents the spoilage of stored materials. If the temperature is above the preset level, it gives LED indications first and after Four minutes it gives loud beeps inviting immediate attention (more…)
Crystal Controlled 38 kHz IR Transmitter
Mar 14th
This is a precision 38 kHz Infrared transmitter using MOS integrated circuit uPD 6121.It uses the NEC transmission format ideally suited for remote operation in TV, VCD Player etc. The NEC transmission format includes leader codes, custom codes (16 bits), and data codes (16 bits).The frequency of oscillation is determined by the Crystal. The IR LEDs connected to the output emits IR pulses at 38kHz.The circuit is ideal for most IR Sensors since these are designed for 38 kHz pulsed IR rays IC uPD 6121 Datasheet
Display Driver
Mar 12th
This display driver circuit shows how a Seven Segment Display is driving with the help of the 5 stage Johnson decade counter IC CD4033.The IC has counter and decoder in one package. It converts the Johnson codes into Seven Segment Decoder output to drive the common cathode display. The display shows the counts in the form of numerical display. CD4033 Datasheet (more…)
Top 10 Electronic Circuits February 2010
Mar 11th
It’s time for the Top 10 Electronic Circuits for February 2010 and we have some articles that went down and others that had jumped a lot in the top 10. We are glad that you like the articles posted on the site and will do the best from now on to bring you the best electronics related informations, circuits and projects. Let’s start the show! (more…)
LED Component Tester with Torch
Mar 6th
Here is a simple tester for Hobbyists. This LED Component tester can test the integrity of electronic components from resistors to ICs before soldering. It reduces the job of testing the components using multimeter. The tester gives LED indications about the Good or Bad conditions of the components. A White LED torch is added to verify the value of the components if light is not sufficient
Telephone Status Indicator
Mar 5th
This simple circuit tells you about the status of phone such as Line OK, Dialing and Call attended. It also has a lock facility to block outgoing calls keeping the incoming calls as usual. This prevents misuse of telephone. The circuit uses only a few components to do all these jobs
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